Home / 2,130.29-3,195.89-831.75

Finding the Fourth Proportional to 2,130.29, 3,195.89 and 831.75

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Solution

The fourth proportional to 2,130.29, 3,195.89 and 831.75 is: 1,247.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.29 : 3,195.89 = 831.75 : x
  2. Step 2: Convert to fraction form
    2,130.29/3,195.89 = 831.75/x
  3. Step 3: Cross multiply
    2,130.29x = 3,195.89 × 831.75
  4. Step 4: Simplify right side
    2,130.29x = 2,658,177.35
  5. Step 5: Solve for x
    x = 2,658,177.35/2,130.29
  6. Step 6: Final answer
    x = 1,247.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.